Wireless communication system and wireless communication method

Abstract

A format that includes a BSSID of a transmitting station within a preamble of the frame is an HE format, and a format that does not include a BSSID within the preamble but includes a BSSID in a MAC header is a Non-HE format; and a wireless station in the BSS includes a control part which checks a format of a frame received at a predetermined receiver sensitivity or above, and continues demodulation of the received frame if the format is HE format and the BSSID in the received frame is consistent with its own BSS, and stops the demodulation of the received frame if the HE format and the BSSID in the received frame is not consistent with its own BSS.

The invention claimed is: 
     
       1. A wireless communication station which transmits and receives a frame using a channel by access control based on carrier sense multiple access with collision avoidance (CSMA/CA) using a clear channel assessment threshold (CCA threshold), wherein:
 a format that includes a field for an identification of a basic service set (BSS) within a preamble of the frame is defined as an HE format; 
 said wireless communication station comprising a control part which is configured to perform: 
 checking a destination station to which an HE format frame is scheduled to be transmitted; 
 controlling the CCA threshold to a value higher than a default value if the destination station is an HE station; and 
 transmitting the frame if the channel is determined to be idle by the CSMA/CA. 
 
     
     
       2. A wireless communication method for transmitting and receiving a frame using a channel by access control based on carrier sense multiple access with collision avoidance (CSMA/CA) using a clear channel assessment threshold (CCA threshold), wherein:
 a format that includes a field for an identification of a basic service set (BSS) within a preamble of the frame is defined as an HE format; 
 said wireless communication method includes the steps of: 
 checking a destination station to which an HE format frame is scheduled to be transmitted; 
 controlling the CCA threshold to a value higher than a default value if the destination station is an HE station; and 
 transmitting the frame if the channel is determined to be idle by the CSMA/CA.